This line chart visualizes global population trends from 1970 to 2022 by summing yearly population figures across all countries in the world_population.csv dataset. The visualization uses D3 v7 with SVG rendering, employing `d3.csv` and `d3.autoType` for data loading, `d3.scaleLinear` for both axes, and `d3.line` with `curveMonotoneX` for the smoothed line path. Orange circles mark individual data points, with tooltips showing exact year and population values via appended `<title>` elements.